Alcatraz Federal Penitentiary opened in 1933 on an island in the San Francisco Bay to house troublemakers from other prisons. It closed in 1963 and was replaced by a prison in Marion, Illinois. Here’s what was on the prisoners’ menu for September 3, 1946. Lunch appeared to be the big meal of the day:

Breakfast: Stewed prunes, bran flakes, fresh milk, sugar, orange roll. bread and coffee

Lunch: split pea soup, roast shoulder of pork, sage dressing, brown gravy, mashed potatoes, stewed corn, apple pie, bread & coffee with milk

Dinner: split pea soup, Boston baked beans, tomato catsup, beet & onion salad, canned pears, bread & coffee

See: “A vintage menu from Alcatraz, 1946” by Paolo Lucchesi on the SFGate website (2013)